Shoto Aizawa, known by his hero name of Eraserhead, is a professional hero and homeroom teacher at UA, a school for aspiring heroes. His Quirk, or power, allows him to "erase" or cancel out another person's Quirk just by looking at them. However, if he blinks, that person's Quirk comes back, meaning he mustn't blink in order for his Quirk to stay active.